19772009281 has 8 divisors (see below), whose sum is σ = 20414306304. Its totient is φ = 19129992960.

The previous prime is 19772009263. The next prime is 19772009333. The reversal of 19772009281 is 18290027791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19772009281 - 2⁵ = 19772009249 is a prime.

It is a super-2 number, since 2×19772009281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19772009261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77985 + ... + 213601.

It is an arithmetic number, because the mean of its divisors is an integer number (2551788288).

Almost surely, 2^19772009281 is an apocalyptic number.

It is an amenable number.

19772009281 is a deficient number, since it is larger than the sum of its proper divisors (642297023).

19772009281 is a wasteful number, since it uses less digits than its factorization.

19772009281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140351.

The product of its (nonzero) digits is 127008, while the sum is 46.

The spelling of 19772009281 in words is "nineteen billion, seven hundred seventy-two million, nine thousand, two hundred eighty-one".